If you add also that batteries, when aging, are a real risk, then, thanks but no.
The amount of superstition about lithium batteries is crazy, given how many of them are used in any household on a daily basis. The battery is functionally not being used if a phone is plugged in and the battery isn’t drained. This misinformation comes back from when people were using Nickel Cadmium cells decades ago, those cells were functionally continuously charged because it caused absolutely no harm to them.
The battery will be charged to 100% constantly.
The battery will be much older and has worse capacity than most consider even usable.
Can't recall succeeding to boot an Android phone with USB charger and no battery.
The "percentage charge" of a lithium cell isn't really any measure of its safety. Even at 0% charge the cells can still auto ignite, there's an incredible amount of energy in them when they're considered to be empty.
In my experience, its usually "only" a problem when later, you discharge the battery and then try charging it back up, thats when stuff starts burning.
So? That's a non-statement as far as safety goes. It's as relevant as the color of my shirt, or the current date, or the state of the moon.
To add some anecdata: I had an old iPhone (IIRC a 4s) running as security cam for about 6 weeks. When I returned, the case was cracked due to a swollen battery.
Granted they were 5+ years old but its there.
I'm currently integrating (project is on pause but one day!) an android tablet into an old car. And the battery was a dealbreaker.
So I've removed the battery and added an resistor to trick it into booting anyway. Only problem is that android think the battery is dead so it won't perform system updates unless I first charge it. Which I guess is fine in this case since the tablet is out of support anyway.
If I remember correctly there are four terminals, aside from power one of them might be battery temperature which I think is mandatory. I measured the resistance on the original and mimicked it. Basically hardcoding the temperature since I don't have a battery. But I could be very wrong on this. Google it first!
[0] https://arstechnica.com/information-technology/2016/11/power...
Also, in theory a rootkit could go into the embedded firmware or use a closed source kernel module. In fairness, that's not a big threat yet - cheap devices tend to get cheap rootkits...
I'm surprised yours works at all, it must be fairly marginal.
I have stress-tested it a bit and know that it won't be a problem for me, certainly not for the music and navigation I will be using it for. Also as far as radios go only wifi+bluetooth.